We have introduced the automatic diamond tool grinder and manipulator. The main toool grinder is 4-Axis CNC PCD&PCBN tool grinder is made of grinding wheel oscillation axis(X-axis), grinding wheel tilt angle axis (B-axis), rotation axis in the horizontal plane(C-axis), working piece feeding axis(Y-axis). working piece feeding axis(Y-axis) is equipped with raster rule, and the closed loop position feedback is used to ensure the precision of micron level grinding. The tool grinder is reliable in performance and it is suitable for massive production of carbide inserts, PCD and CBN inserts. Once centering is finished, grinding will be done automatically, realizing constant pressure grinding and flexible feed. The even consumption of grinding wheel can be measured and compensated by the system, so production with long cycle time can be achieved.